diff --git a/resume_builder/bundles/bundle_data_engineer.md b/resume_builder/bundles/bundle_data_engineer.md
index 38757d0..17a19ea 100644
--- a/resume_builder/bundles/bundle_data_engineer.md
+++ b/resume_builder/bundles/bundle_data_engineer.md
@@ -148,6 +148,10 @@ Same failure mode as BS-6 (Linux/Ansible), found the same week.
 - **Microsoft SQL Server (FC-1).** Fraunhofer's SCEDAS ran on MSSQL with C# and Entity Framework.
   Historical and single-project; do not present it as data-platform depth.
 - **Mentoring (BS-7).** *"Fachliche Betreuung von Studierenden, auch im Rahmen von
-  Abschlussarbeiten"* — documented technical supervision, including thesis supervision. Use it when
+  Abschlussarbeiten"* — documented technical supervision, including thesis supervision. He also
+  served as **Zweitprüfer (second examiner) and supervisor for one Bachelor thesis** at Bosch
+  (user-confirmed 2026-09-11) — a formal role carrying assessment responsibility, which is
+  materially stronger than the team-role evidence the profile otherwise falls back on. Use it when
   a JD asks about developing other engineers (SBB asked explicitly and the answer had to fall back
-  on team roles). **Technical supervision, NOT people management.**
+  on Security Champion and the Java community). **Technical supervision and formal examining, NOT
+  people management. Exactly one thesis as second examiner — do not pluralise.**
diff --git a/resume_builder/bundles/bundle_data_platform.md b/resume_builder/bundles/bundle_data_platform.md
index 2bba60d..13b8374 100644
--- a/resume_builder/bundles/bundle_data_platform.md
+++ b/resume_builder/bundles/bundle_data_platform.md
@@ -157,6 +157,10 @@ Same failure mode as BS-6 (Linux/Ansible), found the same week.
 - **Microsoft SQL Server (FC-1).** Fraunhofer's SCEDAS ran on MSSQL with C# and Entity Framework.
   Historical and single-project; do not present it as data-platform depth.
 - **Mentoring (BS-7).** *"Fachliche Betreuung von Studierenden, auch im Rahmen von
-  Abschlussarbeiten"* — documented technical supervision, including thesis supervision. Use it when
+  Abschlussarbeiten"* — documented technical supervision, including thesis supervision. He also
+  served as **Zweitprüfer (second examiner) and supervisor for one Bachelor thesis** at Bosch
+  (user-confirmed 2026-09-11) — a formal role carrying assessment responsibility, which is
+  materially stronger than the team-role evidence the profile otherwise falls back on. Use it when
   a JD asks about developing other engineers (SBB asked explicitly and the answer had to fall back
-  on team roles). **Technical supervision, NOT people management.**
+  on Security Champion and the Java community). **Technical supervision and formal examining, NOT
+  people management. Exactly one thesis as second examiner — do not pluralise.**
diff --git a/resume_builder/canonical/claims.json b/resume_builder/canonical/claims.json
index 417dad3..5687a2e 100644
--- a/resume_builder/canonical/claims.json
+++ b/resume_builder/canonical/claims.json
@@ -636,22 +636,28 @@
     {
       "id": "BS-7",
       "evidence": {
-        "source": "Bosch Arbeitszeugnis, Dresden 31.12.2022 (primary document, read 2026-09-11)",
-        "ownership": "individual - technical supervision, not line management"
+        "source": "Bosch Arbeitszeugnis, Dresden 31.12.2022, for the general supervision; user confirmation 2026-09-11 for the Zweitpruefer role on one Bachelor thesis",
+        "ownership": "individual - technical supervision and formal second-examiner role"
       },
-      "scope": "Fachliche Betreuung von Studierenden, auch im Rahmen von Abschlussarbeiten - technical supervision of students at Bosch, including their theses. Verbatim from the Arbeitszeugnis. This is DOCUMENTED mentoring evidence and was recorded nowhere before 2026-09-11, although 'developing other engineers' is a recurring JD requirement (SBB asked for it explicitly). It is technical supervision, NOT people management - do not present it as line management or as formal coaching.",
+      "scope": "Fachliche Betreuung von Studierenden, auch im Rahmen von Abschlussarbeiten - technical supervision of students at Bosch, including their theses (verbatim from the Arbeitszeugnis, which uses the plural for both). NAMED INSTANCE, user-confirmed 2026-09-11: he acted as ZWEITPRUEFER (second examiner) AND supervisor for ONE Bachelor thesis by a student at the company. Zweitpruefer is a FORMAL role carrying assessment responsibility, not informal mentoring - that is what makes this stronger than the team-role evidence (Security Champion, Java community) the profile otherwise falls back on. LIMITS: exactly ONE thesis is confirmed as second-examiner work - do not pluralise it; the number of students supervised more generally is not recorded; and none of this is people management or line responsibility.",
       "allowed_verbs": [
         "supervised",
         "mentored",
         "guided",
-        "supported"
+        "supported",
+        "served as second examiner",
+        "assessed"
       ],
       "forbidden": [
         "managed a team",
         "line management",
-        "led engineers"
+        "led engineers",
+        "supervised multiple theses",
+        "academic appointment",
+        "lecturer",
+        "taught a course"
       ],
-      "metrics": "unverified - the number of students is not recorded"
+      "metrics": "one Bachelor thesis as Zweitpruefer/supervisor is confirmed; the wider number of students supervised is unverified"
     }
   ],
   "skills": [